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A member asked:
What neurotransmitter causes pupils to constrict and muscles to contract?
6 doctors weighed in across 3 answers
Acetylcholine: The most common neurotransmitter is acetylcholine.
Answered 9/15/2013
5.1k views
Neurotransmitter: Pupillary constriction is mediated by parasympathetic diners of the autonomic nervous system. Those, as well as the skeletal motor units controlling muscle contraction release acetylcholine as the neurotransmitter.
Answered 9/18/2017
5.1k views
ACh: Acetylcholine. The physiology of muscle contraction is well outlined in many web sites. Happy studying!
Answered 5/26/2013
5.1k views
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